Hey there rjames2895,
Hope you’re well today!
The reason you can find it is because in your theme header.php function is being called which displays your header image, you can see it in line 28 which looks like this:
<?php echo zinnia_heading(); ?>
The function is located in ace_functions.php which is located in /wp-content/themes/zinnia/includes/. You’ll find on line 17 which looks like this:
<img src="<?php header_image(); ?>" class="header-title" height="<?php echo get_custom_header()->height; ?>" width="<?php echo get_custom_header()->width; ?>" alt="<?php bloginfo( 'name' ); ?>" title="<?php bloginfo( 'name' ); ?>" />
replacing alt and title with the text of your choice should get you what you want. Ideally you’d want to override the function with your own in your child theme so you do not lose changes once you update the theme. You can find more information on how to do that by following this link:
http://code.tutsplus.com/tutorials/a-guide-to-overriding-parent-theme-functions-in-your-child-theme–cms-22623
Hope this helps 🙂
Best regards,
Bojan
Exactly what I needed to know. Thanks for your help!